Bantuan Tugas Teknik

b. They are easily with water after proper emulsification dwell time c. They are easily removed from sand dwell time castings after proper emulsification d. They have higher tolerance to variations in the removal process when compared to water washable penetrants 37. When using the visible, solvent removable process.after the penetrant dwell time, excess penetrant is removed by: a. Spraying solvent on the part and then wiping with a clean, dry rag or paper towel b. Wiping off excess penetrant with a clean, dry rag or paper towel, moistening the part with solvent and rewiping the part c. Wiping off excess penetrant with a clean, dry rag or paper towel, moistening a clean cloth with solvent and rewiping the part d. Wiping off excess penetrant with a clean, dry rag or paper towel, then rewiping with a cloth soaked with solvent. 38. Open, shallow discontinuities are best detected by which penetrant testing method? a. Solvent removable b. Water washable c. Post emulsifiable d. None of the above 39. A relevant indication in a casting may be caused by: a. A burst b. A crater crack c. Laminations d. Porosity 40. Compared to a certified Level I inspector, a Level II inspector: a. Can process all forms of a product b. Is authorizec to approve all penetrant procedures c. Requires more formal training hour and work experience d. Can determine the acceptance criteria for a part

21. Which of the followings is the indication that will affect the use of the article Mana dari indication yang berikut diperkirakan akan memberikan efect yang tidak baik dari kegunaan benda uji? a. crack which the major dimension 1.5 mm $(1/16^{\circ })$ b. overlap c. rounded indication which the major dimension 6 mm d. undercut e. none of the above.

Elongated inclusions found in bar stock are called: a . Seams b. Laps C . Stringers d . Contaminants

19. What are you doing, if there is surface irregularities of parts being tested by MT? Gimana memper lakukan surface irregularitie s dari parts yang pengujiar dengan MT? a. it may be grinding or machining to improve visibility of the indications b. irregul arities are not a problem for MT c. the surface is never found as the factor of faulty nor difficulty of the examination d. it shall be discussed to supervisor e. all of the above. f. band d are correct

22.The penetrant process best suited for use on parts with keyways and threads is: a . Solvent removable b. Water washable c. Post emulsifiable d. Magnetic Particle

d. Self emuslifying 29. Which of the items listed below is a penetrant test method? disadvantage of using the liquid a. The method cannot find discontinuities that are not opened to the surface b. The method is simple in principle and relatively easy to understand c. The method is essentially simple in application d. There are few limitations on the size and shape of the article that can be treated by this method 30. Which of the statements below applies to the liquid penetrant method of testing? a. The penetrant test method is less flexible than the eddy current test method b. The penetrant test method is less reliable than the magnetic particle method for finding surface defects in ferromagnetic materials c. The penetrant test method will not detect fatigue cracks d. The penetrant test method is more reliable than radiographic testing when attempting to detect minute surface discontinuities 31. Which of the following types of discontinuities cannot be detected by the liquid penetrant test method? a. Surface laminations b. Internal forging bursts c. Surface cracks d. Surface laps 32. Developer assists in the detection of discontinuities by: a. Providing a contrasting background b. Emulsifying the penetrant bleedout c. Providing a clean surface d. Providing a dry surface 33. Difficulties with removal of a post emulsifiable penetrant during the rinse operation can be overcome by: a. Reapplying a coating of emulsifier b. Using conditioned (soft)water during the washing operation c. Cleaning, then completely emulsification time d. Increasing the water temperature during the washing operation 34. Excessive removal of penetrant may result in: a. Undetected discontinuities during evaluation b. An excessive background that inhibits the evaluation process c. The need to apply the developer twice to obtain significant bleedout d. Small, tight cracks that are easily detected on parts with a smooth surface 35. Which of the following is an advantage of a fluorescent water washable penetrant system compared to a fluorescent post emulsifiable penetrant system: a. Water washable is superior for testing critical in service parts b. Water washable has fewer processing steps c. Only wet developer may be used with post emulsifiable penetrants d. Water washable penetrants will more readily detect fine , tight cracks in weldments 36. Which of the following is not an advantage of post emulsifiable fluorescent penetrants: a. High sensitivity level to detect very fine defects

21 or cyclic loads below the yieldstrength of a material can cause: a. Service cracking b. Fatigue cracking c. Intergranular cracking d cracking

$II$ ESSAY (weight: $60\% $ your own words ,make sentences consisting of at least 8 words related to civil engineering using the following words. $(w=12.5\% )$ a. loading (noun) b. environment l (adjective) c. structurally (adverb) d. safely (adverb) e. similar (adjective) 2. Draw an oblique of a triangular prism. $(weight=7.5\% )$ 3 completely heavy-weight concrete , light-weigh concrete, and high performance (including properties applications of each concrete type, etc.). $(weight=15\% )$ 4. Explain the difference(s)between an adjective and an adverb . Then, explain them clearly by examples of each. $(w=10\% )$ 5.Create a conversation about concrete , the advantages and the disadvantages of concrete (at least 4 of each). $(w=10\% )$

19. The penetrant process best suited for the of very fine discontinuities is? a. Solvent removable b. Water washable c. Post emulsifiable d . Magnetic Particle

Sub CPMK 5 Mahasiswa mampu menjelaskan tentang pasca tambang. 1. Berikan definisi dari istilah-ist llah dibawah ini dan buat pula dalam bentuk satu gambar sudah mengandung istilah-istilah a. Adit b. Inclined shaft c. Level f. Stope g. Sump h. Winze d. Drift Foot Wall e. Ramp k. Hanging wall I. i. Raise j. Skip dan Headframe 2. Sebutkan dan jelaskan : a. Pekerjaan-pekerjaan persiapan penambangan pada bawah tanah. tanah. D. Peralatan yang digunakan dalam persiapan dan penambangan pada tambang bawah 3. Saat ini, hampir semua aktivitas manusia menggunakan teknologi digital seperti loT dan Al, begitu pula aktivitas tambang. Jelaskan penerapan loT dan Al pada aktivitas pertambangan! 4. Reklamasi dan pascatambang merupakan kegiatan yang harus dilakukan untuk dapat memulihkan lingkungan yang ditimbulkannya. a. Jelaskan perbedaan antara reklamasi dan pascatambangi b. Mengapa kondisi sekitar lokasi tambang harus dijelaskan pada dokumen dilaksanakan? Jelaskan pendapat saudara!' pascatambang?Apakah ada kaitannya dengan program pascatambang yang akan 5. Wills' Mineral Processing Technology "An Introduction to the Practical Aspects of Ore Treatment and Mineral Recovery Pada Introduction tersebut,dinyatakan pada beberapa Alinea dibawah ini : "As-mined" or "run -of-mine" ore consists of minerals and gangue Mineral processing, also known as ore dressing, ore beneficiation mineral dressing, or milling,